Space Exploration

Moving to Mars with Marshall Brain

In 2017, Elon Musk laid out plans to build a permanent colony on Mars -- one with at least a million human inhabitants. What would this colony look like? How would it work? Most importantly, could we use a Martian colony as an opportunity to improve on the socioeconomic practices of Earth? To find these answers, Ben, Matt and Noel went to the smartest guy they know: Marshall Brain, the founder of HowStuffWorks and author of "Imagining Elon Musk's Million-Person Mars Colony."

How could aliens contact us?

Could alien life forms really contact human beings? How would they do it? Is it possible that other humans could intercept the message -- and keep it secret? Listen in to learn more.